这个的问题出在哪儿啊

LXF2013

# 第五次尝试
import pygame
import sys
import random
pygame.init()
pygame.mixer.init()

# 球类
class Ball(pygame.sprite.Sprite):
    def __init__(self,image,position,speed,direction):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.image.load(image).convert_alpha()
        self.rect = self.image.get_rect()
        self.rect.left,self.rect.top = position
        self.position = position
        self.speed = speed
        self.direction = direction

    def move(self):
        if self.rect.left < 0 or self.rect.right > 1024:
            self.speed[0] = -self.speed[0]
        if self.rect.top < 0 or self.rect.bottom >600:
            self.speed[1] = -self.speed[1]
        if self.speed[0] < 0 and self.direction == 1 or \
               self.speed[0] > 0 and self.direction == -1:
                self.image = pygame.transform.flip(self.image,True,False)
                self.direction = -self.direction
        self.rect = self.rect.move(self.speed)


def main():

    # 设置
    direction = 1
    image = '1534159777517.png'
    background_image = 'picture29.jpg'
    background =pygame.image.load(background_image).convert()
    runing = True
    screen = pygame.display.set_mode((1024,600))
    pygame.display.set_caption('第五次尝试')

    # 创建
    balls = []
    for ball in range(5):
        position = (random.randint(0,1024-90),random.randint(0,600-144))
        speed = [random.randint(-10,10),random.randint(-10,10)]
        ball = Ball(image,position,speed,direction)
        balls.append(ball)
    clock = pygame.time.Clock()

    while runing:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                sys.exit()
               
        screen.blit(background,(0,0))
        for each in balls:
            each.move()
            screen.blit(each.image,each.rect)
        pygame.display.flip()
        clock.tick(30)

if __name__ == '__main__':
    main()
        
            









background =pygame.image.load(background_image).convert()
pygame.error: No video mode has been set

zltzlt

https://blog.csdn.net/WANG_yu09/article/details/81639023

一个账号

定义屏幕要在转换图片之前，交换顺序就OK：

1. # 第五次尝试
   
2. import pygame
   
3. import sys
   
4. import random
   
5. pygame.init()
   
6. pygame.mixer.init()
   
7. 
   
8. # 球类
   
9. class Ball(pygame.sprite.Sprite):
   
10.     def __init__(self,image,position,speed,direction):
    
11.         pygame.sprite.Sprite.__init__(self)
    
12.         self.image = pygame.image.load(image).convert_alpha()
    
13.         self.rect = self.image.get_rect()
    
14.         self.rect.left,self.rect.top = position
    
15.         self.position = position
    
16.         self.speed = speed
    
17.         self.direction = direction
    
18. 
    
19.     def move(self):
    
20.         if self.rect.left < 0 or self.rect.right > 1024:
    
21.             self.speed[0] = -self.speed[0]
    
22.         if self.rect.top < 0 or self.rect.bottom >600:
    
23.             self.speed[1] = -self.speed[1]
    
24.         if self.speed[0] < 0 and self.direction == 1 or \
    
25.                self.speed[0] > 0 and self.direction == -1:
    
26.                 self.image = pygame.transform.flip(self.image,True,False)
    
27.                 self.direction = -self.direction
    
28.         self.rect = self.rect.move(self.speed)
    
29. 
    
30. 
    
31. def main():
    
32. 
    
33.     # 设置
    
34.     direction = 1
    
35.     image = '1534159777517.png'
    
36.     background_image = 'picture29.jpg'
    
37.     runing = True
    
38.     screen = pygame.display.set_mode((1024,600))
    
39.     background =pygame.image.load(background_image).convert()
    
40.     pygame.display.set_caption('第五次尝试')
    
41. 
    
42.     # 创建
    
43.     balls = []
    
44.     for ball in range(5):
    
45.         position = (random.randint(0,1024-90),random.randint(0,600-144))
    
46.         speed = [random.randint(-10,10),random.randint(-10,10)]
    
47.         ball = Ball(image,position,speed,direction)
    
48.         balls.append(ball)
    
49.     clock = pygame.time.Clock()
    
50. 
    
51.     while runing:
    
52.         for event in pygame.event.get():
    
53.             if event.type == pygame.QUIT:
    
54.                 sys.exit()
    
55.                
    
56.         screen.blit(background,(0,0))
    
57.         for each in balls:
    
58.             each.move()
    
59.             screen.blit(each.image,each.rect)
    
60.         pygame.display.flip()
    
61.         clock.tick(30)
    
62. 
    
63. if __name__ == '__main__':
    
64.     main()

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